My 3.5year old DD has always been a child to have good-manners & to never speak rudely (as good as a 3.5 year old gets i think, lol ) ... and then the last month she has started speaking to DP & i in a rude manner which shocks us both ... All we can do is persist on everytime she does it we address her about it asap and let her know it's wrong and not right to speak in such a manner to us or anyone else.

The only advice i have for you " LZ " is to do the same but i'm guessing you already are (so i'm probably of not much help sorry) !!

Fingers crossed for us ' all ' (* sigh *)